Tech Briefs Magazine - July 2021 - 48

Health & Biotech
crobial properties also use metallic compounds
such as silver or copper ions.
Such synthetic materials approved for
use in biomedical applications are more
costly as compared to the new hydrogel
made from natural waste materials.
Waste products that are currently discarded
in large quantities - durian
husks and glycerol - could be turned
into a valuable biomedical
resource
that can enhance the speedy recovery
of wounds and reduce chances of infections.
With the husk comprising 60% of
the durian, it is usually discarded and
incinerated, posing an environmental
issue. Being non-toxic and biodegradable,
the organic gel bandage is also
expected to have a smaller environmental
footprint than conventional synthetic
bandages.
The natural yeast phenolics embedded
in the new bandage will help to prevent
the growth of bacteria such as
Gram-negative E. coli and Gram-positive
S. aureus and the subsequent formation
of biofilms (a layer of slime that
can lead to antimicrobial
resistance
within a bacteria colony). The hydrogel
bandage is applied by simply laying it
across the wound, just as with existing
commercially available silicone gel sheets
for wound dressing.
Organic hydrogels are also useful for
wearable, flexible, and stretchable electronics.
Wearable electronics can consist
of small sensors that detect heart rate
and physical activities, much like current
smart bands. They could aid healthcare
workers in monitoring the health of the
elderly in remote communities.
For more information, contact Lester Kok
at lesterkok@ntu.edu.sg.
International Space Station Advanced Resistive Exercise
Device (ARED)
Terrestrial uses include physical therapy, clinical diagnosis, athletic training and performance,
and robust exercise equipment.
Lyndon B. Johnson Space Center, Houston, Texas
person who is inactive for an ex -
tended period of time (such as
when they have a long illness) loses
strength as well as muscle and bone
mass. Astronauts on the International
Space Station (ISS) face similar risks
because bones and muscles begin to
atrophy in the absence of gravity. Re -
sistive exercise, where the musculoskeletal
system bears weight, has been shown
to mitigate these effects. But just lifting
weights, as we do on Earth, does not
work without gravity.
A
Engineers at NASA Johnson developed
a special resistive exercise device
for astronauts on the ISS to follow a personalized
exercise plan in the microgravity
environment of low-earth orbit. The
Advanced Resistive
Exercise
(ARED) has the capability to exercise all
major muscle groups - focusing on
squats, dead lifts, and calf raises - and
helps the crew maintain their strength
and endurance.
The ARED is a mechanically simple
but robust device. It employs vacuum
cylinders to provide a constant resis -
tance, while flywheel assemblies provide
a variable resistance. The variable resis -
tance supplied by the flywheel assemblies
is designed to mimic the inertial
forces generated when lifting free
weights on Earth. It is not dependent on
gravity to operate but can operate in
Earth gravity as well as microgravity.
It was flown to the ISS in November
2008 and is designed to last at least 15
48
Cov
Device
Using the ARED, astronauts on the International Space Station maintain their health in the absence
of gravity.
years, with a total life of more than 11.2
million cycles. The ARED accommodates
a wide range of body types and
sizes. There is also a touchscreen that
makes it easier for an astronaut to follow
a personalized prescribed exercise plan.
A crewmember may select any exercise
from their prescription or choose other
available exercises. The crew performs
their exercises using either a lift bar or a
cable assembly. Resistive load can be
www.techbriefs.com
ToC
adjusted between 0 and 600+ pounds for
bar-related exercises and up to 150
pounds for cable-related exercises.
NASA is actively seeking licensees to commercialize
this technology. Please contact
NASA's Licensing Concierge at AgencyPatent-Licensing@mail.nasa.gov
or call us
at 202-358-7432 to initiate licensing discussions.
Follow this link for more information:
https://technology.nasa.gov/patent/MSCTOPS-59.
Tech
Briefs, July 2021
https://technology.nasa.gov/patent/MSC-TOPS-59 http://www.techbriefs.com http://www.abpi.net/ntbpdfclicks/l.php?202107TBNAV

Tech Briefs Magazine - July 2021

Table of Contents for the Digital Edition of Tech Briefs Magazine - July 2021

Tech Briefs Magazine - July 2021 - Intro
Tech Briefs Magazine - July 2021 - Sponsor
Tech Briefs Magazine - July 2021 - Cov1
Tech Briefs Magazine - July 2021 - Cov2
Tech Briefs Magazine - July 2021 - 1
Tech Briefs Magazine - July 2021 - 2
Tech Briefs Magazine - July 2021 - 3
Tech Briefs Magazine - July 2021 - 4
Tech Briefs Magazine - July 2021 - 5
Tech Briefs Magazine - July 2021 - 6
Tech Briefs Magazine - July 2021 - 7
Tech Briefs Magazine - July 2021 - 8
Tech Briefs Magazine - July 2021 - 9
Tech Briefs Magazine - July 2021 - 10
Tech Briefs Magazine - July 2021 - 11
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Tech Briefs Magazine - July 2021 - 15
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Tech Briefs Magazine - July 2021 - 17
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Tech Briefs Magazine - July 2021 - Cov3
Tech Briefs Magazine - July 2021 - Cov4
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